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Assabet River at Maynard

Highest listed crest 8.94 ftFlood stage 5.0 ft71 crests since 1942

The Assabet River at Maynard crested at major flood stage 6 times among the 71 crests the National Weather Service lists from 1942 to 2024. The highest, 8.94 ft on August 20, 1955, was major flooding, 3.94 feet above flood stage.

The gauge

Highest listed crest
8.94 ft
August 20, 1955; 4,250 cubic feet per second
Flood stage
5.0 ft
Major flooding from 7.0 ft
Crests at major
6
3rd of 65 gauges in Massachusetts
Most recent flood crest
January 12, 2024
5.60 ft, minor flooding
Location
Middlesex County
Near Marlborough (7.6 mi), Framingham (8.6 mi), Waltham (11.0 mi)

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Assabet River at Maynard
Action stage4.510Mar 23, 2003The level at which the NWS or its partners begin to take action
Flood stage (minor)5.045Jan 12, 2024Minimal or no property damage, but possibly some public threat
Moderate flood stage6.010Feb 26, 2010Some inundation of structures and roads near the stream
Major flood stage7.06Mar 31, 2010Extensive inundation of structures and roads

Every listed crest

71 crests from 1942 to 2024. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Assabet River at Maynard, 1942 to 2024 456789ft Flood stage 5.0 ftMajor 7.0 ft Mar 19, 1942: 5.00 ft, minor flooding; 960 cubic feet per secondMar 21, 1943: 4.79 ft, action stage; 8,800 cubic feet per secondMar 7, 1945: 4.88 ft, action stage; 9,196 cubic feet per secondMar 9, 1946: 5.16 ft, minor flooding; 1,100 cubic feet per secondMar 21, 1948: 5.75 ft, minor flooding; 1,460 cubic feet per secondFeb 19, 1951: 4.72 ft, action stage; 9,200 cubic feet per secondNov 9, 1951: 4.93 ft, action stage; 10,200 cubic feet per secondMar 17, 1953: 5.12 ft, minor flooding; 1,120 cubic feet per secondSep 13, 1954: 6.47 ft, moderate flooding; 2,040 cubic feet per secondAug 20, 1955: 8.94 ft, major flooding; 4,250 cubic feet per secondJan 11, 1956: 5.48 ft, minor flooding; 1,380 cubic feet per secondJan 28, 1958: 5.38 ft, minor flooding; 1,320 cubic feet per secondApr 4, 1959: 5.26 ft, minor flooding; 1,250 cubic feet per secondApr 1, 1960: 5.35 ft, minor flooding; 1,300 cubic feet per secondApr 18, 1961: 5.01 ft, minor flooding; 1,040 cubic feet per secondApr 2, 1962: 5.99 ft, minor flooding; 1,670 cubic feet per secondMar 28, 1963: 6.12 ft, moderate flooding; 1,760 cubic feet per secondMay 27, 1967: 4.92 ft, action stage; 10,100 cubic feet per secondMar 19, 1968: 8.15 ft, major flooding; 3,620 cubic feet per secondMar 27, 1969: 6.02 ft, moderate flooding; 1,690 cubic feet per secondFeb 12, 1970: 6.14 ft, moderate flooding; 1,780 cubic feet per secondMar 17, 1972: 4.51 ft, action stage; 8,990 cubic feet per secondMar 23, 1972: 5.89 ft, minor flooding; 1,590 cubic feet per secondFeb 4, 1973: 5.20 ft, minor flooding; 1,160 cubic feet per secondMar 23, 1974: 4.65 ft, action stage; 8,306 cubic feet per secondFeb 26, 1975: 5.02 ft, minor flooding; 1,030 cubic feet per secondJan 28, 1976: 5.01 ft, minor flooding; 1,030 cubic feet per secondMar 15, 1977: 5.37 ft, minor flooding; 1,250 cubic feet per secondMar 29, 1978: 5.63 ft, minor flooding; 1,420 cubic feet per secondJan 26, 1979: 8.11 ft, major flooding; 3,420 cubic feet per secondMar 23, 1980: 4.85 ft, action stage; 10,206 cubic feet per secondFeb 27, 1981: 4.51 ft, action stage; 8,576 cubic feet per secondJun 7, 1982: 6.68 ft, moderate flooding; 2,300 cubic feet per secondMar 13, 1983: 5.48 ft, minor flooding; 1,260 cubic feet per secondJun 3, 1984: 6.25 ft, moderate flooding; 1,780 cubic feet per secondMar 16, 1986: 5.46 ft, minor flooding; 1,360 cubic feet per secondApr 7, 1987: 7.17 ft, major flooding; 2,580 cubic feet per secondApr 2, 1993: 6.37 ft, moderate flooding; 1,960 cubic feet per secondMar 24, 1994: 5.19 ft, minor flooding; 1,380 cubic feet per secondJan 29, 1996: 5.55 ft, minor flooding; 1,610 cubic feet per secondOct 22, 1996: 5.80 ft, minor flooding; 1,590 cubic feet per secondOct 21, 1997: 5.52 ft, minor flooding; 1,590 cubic feet per secondMar 11, 1998: 5.61 ft, minor flooding; 1,550 cubic feet per secondMay 12, 1998: 5.10 ft, minor floodingJun 15, 1998: 5.49 ft, minor floodingApr 24, 2000: 5.62 ft, minor flooding; 1,550 cubic feet per secondMar 23, 2001: 6.41 ft, moderate flooding; 2,090 cubic feet per secondMar 23, 2003: 4.84 ft, action stage; 1,040 cubic feet per secondApr 3, 2004: 5.95 ft, minor flooding; 1,770 cubic feet per secondMar 30, 2005: 5.47 ft, minor floodingApr 4, 2005: 5.71 ft, minor flooding; 1,650 cubic feet per secondOct 16, 2005: 5.52 ft, minor flooding; 1,530 cubic feet per secondOct 27, 2005: 5.20 ft, minor floodingMay 15, 2006: 5.38 ft, minor floodingApr 17, 2007: 6.28 ft, moderate flooding; 2,040 cubic feet per secondFeb 20, 2008: 5.23 ft, minor flooding; 1,291 cubic feet per secondMar 9, 2008: 5.77 ft, minor flooding; 1,520 cubic feet per secondDec 13, 2008: 5.59 ft, minor flooding; 1,410 cubic feet per secondFeb 26, 2010: 6.39 ft, moderate flooding; 1,950 cubic feet per secondMar 16, 2010: 7.14 ft, major flooding; 2,553 cubic feet per secondMar 24, 2010: 5.44 ft, minor flooding; 1,316 cubic feet per secondMar 31, 2010: 7.08 ft, major flooding; 2,530 cubic feet per secondMar 8, 2011: 5.56 ft, minor flooding; 1,390 cubic feet per secondMar 13, 2011: 5.09 ft, minor flooding; 1,120 cubic feet per secondJun 15, 2013: 5.17 ft, minor flooding; 1,210 cubic feet per secondApr 8, 2017: 5.20 ft, minor flooding; 1,240 cubic feet per secondNov 28, 2018: 5.13 ft, minor flooding; 1,199 cubic feet per secondSep 3, 2021: 5.27 ft, minor flooding; 1,274 cubic feet per secondMar 15, 2023: 5.14 ft, minor flooding; 1,210 cubic feet per secondDec 20, 2023: 5.94 ft, minor flooding; 1,679 cubic feet per secondJan 12, 2024: 5.60 ft, minor flooding; 1,466 cubic feet per second Highest, 8.94 ft, Aug 20, 1955 1960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Assabet River at Maynard 1940s: 3 1950s: 6 1960s: 6 1970s: 8 1980s: 5 1990s: 8 2000s: 12 12 2010s: 9 2020s: 4 1940s1950s1960s1970s1980s1990s2000s2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

The 50 highest of 71 listed crests.

Highest listed crests, Assabet River at Maynard
1Aug 20, 19558.94+3.94Major4,250
2Mar 19, 19688.15+3.15Major3,620
3Jan 26, 19798.11+3.11Major3,420
4Apr 7, 19877.17+2.17Major2,580
5Mar 16, 20107.14+2.14Major2,553
6Mar 31, 20107.08+2.08Major2,530
7Jun 7, 19826.68+1.68Moderate2,300
8Sep 13, 19546.47+1.47Moderate2,040
9Mar 23, 20016.41+1.41Moderate2,090
10Feb 26, 20106.39+1.39Moderate1,950
11Apr 2, 19936.37+1.37Moderate1,960
12Apr 17, 20076.28+1.28Moderate2,040
13Jun 3, 19846.25+1.25Moderate1,780
14Feb 12, 19706.14+1.14Moderate1,780
15Mar 28, 19636.12+1.12Moderate1,760
16Mar 27, 19696.02+1.02Moderate1,690
17Apr 2, 19625.99+0.99Minor1,670
18Apr 3, 20045.95+0.95Minor1,770
19Dec 20, 20235.94+0.94Minor1,679
20Mar 23, 19725.89+0.89Minor1,590
21Oct 22, 19965.80+0.80Minor1,590
22Mar 9, 20085.77+0.77Minor1,520
23Mar 21, 19485.75+0.75Minor1,460
24Apr 4, 20055.71+0.71Minor1,650
25Mar 29, 19785.63+0.63Minor1,420
26Apr 24, 20005.62+0.62Minor1,550
27Mar 11, 19985.61+0.61Minor1,550
28Jan 12, 20245.60+0.60Minor1,466
29Dec 13, 20085.59+0.59Minor1,410
30Mar 8, 20115.56+0.56Minor1,390
31Jan 29, 19965.55+0.55Minor1,610
32Oct 21, 19975.52+0.52Minor1,590
33Oct 16, 20055.52+0.52Minor1,530
34Jun 15, 19985.49+0.49Minor—
35Jan 11, 19565.48+0.48Minor1,380
36Mar 13, 19835.48+0.48Minor1,260
37Mar 30, 20055.47+0.47Minor—
38Mar 16, 19865.46+0.46Minor1,360
39Mar 24, 20105.44+0.44Minor1,316
40Jan 28, 19585.38+0.38Minor1,320
41May 15, 20065.38+0.38Minor—
42Mar 15, 19775.37+0.37Minor1,250
43Apr 1, 19605.35+0.35Minor1,300
44Sep 3, 20215.27+0.27Minor1,274
45Apr 4, 19595.26+0.26Minor1,250
46Feb 20, 20085.23+0.23Minor1,291
47Feb 4, 19735.20+0.20Minor1,160
48Oct 27, 20055.20+0.20Minor—
49Apr 8, 20175.20+0.20Minor1,240
50Mar 24, 19945.19+0.19Minor1,380

Other gauges in Middlesex County

Flood gauges in Middlesex County
Waltham5.07.56 ft, Mar 16, 20100
Lowell8.09.74 ft, Mar 17, 20100
Lowell52.068.40 ft, Mar 20, 19365
East Pepperell8.019.10 ft, Mar 20, 19363
Wilmington7.010.54 ft, Mar 16, 20102
West Groton7.08.50 ft, Apr 17, 20070
Saxonville10.013.99 ft, Mar 31, 20103

Middlesex County: every hazard · River floods across the country · Massachusetts

NOAA National Water Prediction Service, gauge MAYM3, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.